[Coco] DriveWire 4 and Linux serial port

[Allen Huffman]

> On Feb 8, 2015, at 8:47 AM, Steven Hirsch <snhirsch at gmail.com> wrote:
> 
> And, for extra credit, the BeagelBone Black CPU has a pair of slave processors called PRUs (programmable real-time units) that run at 200Mhz with 100% deterministic timing.


That is cool. SO many Pi projects use an Arduino in conjunction just to read I/O because, I assume, the non-realtime nature of Linux gets in the way. I saw an arcade controller solution, using the Pi I/O pins, that had to poll to read them, chewing up a small percentage of CPU time.

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